Mischa smoking a joint at designer Roberto Cavalli's yacht during her stay in the Cannes film festival.

Here are two things that are not right: "joint" with "Roberto Cavalli" and "Cannes".If Mischa wants to smoke a joint she's free to do it, she has been seen her before doing it but don't do it at such an important film festival and in the yacht of Roberto Cavalli.

Simply because this festival is well-known for its class and fame and that doesn't match.

Does she nees to get some behaviour lessons or she just can't help it?